Controlling Structure and Catalytic Function of Supramolecular Complexes by External Stimuli

环糊精（CDs）也具有圆柱形结构，与各种底物形成包合物，作为酶模型引起了许多研究者的兴趣。我们发现了一些聚合物与CDs形成包合物，并报道了超分子聚合物配合物，如轮烷和纳米管等。然而，没有轴分子具有生长能力的轮烷类化合物的报道。我们发现CD选择性地包含一些内酯，并通过将CD和内酯混合而引发聚合，得到聚酯末端只有一个CD分子的聚酯。在这里，我们假设具有CD的聚酯仍然具有聚合内酯的能力。在这个项目中，我们展示了一种新型聚伪轮烷的构建，这种聚伪轮烷是由一种具有CD的聚酯生长而成的。尽管轴分子本身没有表现出内酯的聚合活性，但它通过形成聚伪轮烷而表现出了聚合活性。我们报道了内酯在β- cd基纳米球上的寡聚反应，并表明α-CD在纳米球上的加入导致了聚伪轮烷的球形超分子的形成。

Cyclodextrins (CDs), which also have the cylindrical structure, form inclusion complexes with various substrates and have fascinated many researchers as an enzyme model. We found the formation of inclusion complexes of some polymers with CDs and reported the supramolecular polymer complexes, such as rotaxanes and nano-tube etc. However, no rotaxanes, in which an axis molecule possesses the ability to grow up, have been reported. We found that CDs selectively include some lactones and initiate the polymerizations to give polyesters having a single CD molecule at the end of polyester only by mixing CD and lactones. Here, we have supposed that the polyesters having a CD would still have the polymerization ability for lactones. In this project, we show the construction of novel poly-pseudo-rotaxane with a growing polyester having a CD. Although an axis molecule itself did not show the polymerization activity for lactone, it has showed the activity by the formation of poly-pseudo-rotaxane. we report the oligomerization of lactone on the β-CD-based nano-sphere and show that an addition of α-CD to the nano-sphere led to form spherical supramolecule with poly-pseudo-rotaxane.